Commit f6ff1c76 authored by Yang Jihong's avatar Yang Jihong Committed by Arnaldo Carvalho de Melo
Browse files

perf evlist: Add perf_evlist__go_system_wide() helper 



For dummy events that keep tracking, we may need to modify its cpu_maps.

For example, change the cpu_maps to record sideband events for all CPUS.

Add perf_evlist__go_system_wide() helper to support this scenario.

Signed-off-by: default avatarYang Jihong <yangjihong1@huawei.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Tested-by: default avatarRavi Bangoria <ravi.bangoria@amd.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20230904023340.12707-2-yangjihong1@huawei.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent b333067f

tools/lib/perf/evlist.c

+9 −0
Original line number Diff line number Diff line
@@ -738,3 +738,12 @@ int perf_evlist__nr_groups(struct perf_evlist *evlist) 
	}

	return nr_groups;

}



void perf_evlist__go_system_wide(struct perf_evlist *evlist, struct perf_evsel *evsel)

{

	if (!evsel->system_wide) {

		evsel->system_wide = true;

		if (evlist->needs_map_propagation)

			__perf_evlist__propagate_maps(evlist, evsel);

	}

}

tools/lib/perf/include/internal/evlist.h

+2 −0
Original line number Diff line number Diff line
@@ -135,4 +135,6 @@ int perf_evlist__id_add_fd(struct perf_evlist *evlist, 
void perf_evlist__reset_id_hash(struct perf_evlist *evlist);



void __perf_evlist__set_leader(struct list_head *list, struct perf_evsel *leader);



void perf_evlist__go_system_wide(struct perf_evlist *evlist, struct perf_evsel *evsel);

#endif /* __LIBPERF_INTERNAL_EVLIST_H */